Analysis of Fatigue Life of PMMA at Different Frequencies Based on a New Damage Mechanics Model

1Research Institute of Unmanned Aircraft, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China2State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received 12 March 2014; Revised 28 April 2014; Accepted 4 May 2014; Published 11 June 2014